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<html>
  <head>
    <meta charset='utf-8'>
    <meta name='viewport' content='width=device-width, initial-scale=1, user-scalable=no'>
    <meta name='mobile-web-app-capable' content='yes'>
    <meta name='apple-mobile-web-app-capable' content='yes'>
    <link rel='icon' type='image/png' sizes='32x32' href='../favicon-32x32.png'>
    <link rel='icon' type='image/png' sizes='96x96' href='../favicon-96x96.png'>
    <link rel='stylesheet' href='../css/common.css'>

    <title>Sponza</title>
  </head>
  <body>
    <header>
      <details open>
        <summary>Sponza</summary>
        <p>
          Loads a larger scene than other samples for performance testing.
          <a class="back" href="./">Back</a>
        </p>
        <input type="checkbox" id="do_multiview" checked>use multiview</input>
      </details>
    </header>
    <script type="module">
      import {WebXRSampleApp} from '../js/webxr-sample-app.js';
      import {Gltf2Node} from '../js/render/nodes/gltf2.js';
      import {SkyboxNode} from '../js/render/nodes/skybox.js';
      import {quat} from '../js/render/math/gl-matrix.js';
      import {QueryArgs} from '../js/util/query-args.js';
      import { createWebGLContext } from '../js/render/core/renderer.js';

      let do_multiview = document.getElementById('do_multiview');

      function testMultiViewCompatibility() {
        let tempWebGLContext = createWebGLContext({
          xrCompatible: true,
          webgl2: true
        });

        return tempWebGLContext.getExtension('OVR_multiview2') != null;
      }

      if (!testMultiViewCompatibility()) {
        do_multiview.checked = false;
        do_multiview.disable = true;
      }

      // If requested, use the polyfill to provide support for mobile devices
      // and devices which only support WebVR.
      import WebXRPolyfill from '../js/third-party/webxr-polyfill/build/webxr-polyfill.module.js';
      if (QueryArgs.getBool('usePolyfill', true)) {
        let polyfill = new WebXRPolyfill();
      }

      // WebXR sample app setup
      class CustomWebXRSampleApp extends WebXRSampleApp {
        onInitRenderer() {
          super.onInitRenderer();

          this.renderer.globalLightDir = [-0.2, -1.0, -0.2];
          this.renderer.globalLightColor = [7.0, 7.0, 8.0];
        }
      };

      let app = new CustomWebXRSampleApp({
        referenceSpace: 'local-floor', useMultiview: do_multiview.checked
      });
      document.querySelector('header').appendChild(app.xrButton.domElement);

      app.scene.addNode(new SkyboxNode({url: '../media/textures/eilenriede-park-2k.png'}));
      let sponza = new Gltf2Node({url: '../media/gltf/sponza/Sponza.gltf'});

      // Rotate the scene 90deg so that you start looking down the gallery.
      quat.rotateY(sponza.rotation, sponza.rotation, Math.PI / 2.0);
      app.scene.addNode(sponza);
      app.scene.standingStats(true);

      // Start the XR application.
      app.run();
    </script>
  </body>
</html>
